Senior Manual QA Engineer for Mobile App Central Europe

Senior Manual QA Engineer for Mobile App A large-scale consumer mobile application with millions of active users required a robust testing strategy to ensure stability, performance, and seamless user experience. Testing efforts focused on both iOS and Android platforms, covering functional validation, UI/UX consistency, geolocation features, and real-time interactions. Own end-to-end QA within a sprint:

create test strategies/plans, define scope & priority, estimate effort, track progress, unblock issues, and ensure on-time, high-quality releases. Plan and execute test cycles

across feature, integration, regression, and release certification (TestFlight/Internal App Sharing/production). Author clear, reproducible defects

with videos, logs, and device metadata; drive root cause and follow-through to resolution. Partner with developers & PMs

to clarify requirements/acceptance criteria, risks, and success metrics. Network-aware testing

(airplane mode, 2G/3G throttling, packet loss) using proxies and emulator/simulator tools. Release readiness:

build verification, smoke suites, sanity checks; participate in bug triage, go/no-go, and post-mortems. Automation-aware:

convert high-priority manual scenarios into actionable automation tickets; collaborate with SDETs on monthly audits and coverage plans. Lead release-team testathons

for major feature launches: plan charters, coordinate cross-functional participants, track findings, and publish results. Work closely with the automation team on weekly release regression cycles:

align scope, review flaky tests, and prioritize automation candidates from recent escapes. Hands-on memory profiling

using

Xcode Instruments

and

Android Studio Profiler ; detect leaks/retention, analyze heap/allocations, and file actionable performance bugs with traces. Be metrics-oriented

and deliver

weekly Quality Release Reports

to the Release Manager (coverage & pass rate, defect density/age/SLA, crash-free users, ANR rate, cold-start time, flakiness, known risks). 5+ years

of hands-on QA for

iOS and Android

consumer apps (feature, integration, regression, release testing). Strong understanding of SDLC and mobile release trains

(feature flags, build types, staged rollouts, crash & analytics tooling). Clear, proactive communication —align with developers and product on requirements, test plans, and test strategies

without supervision . Proven end-to-end ownership

of sprint QA (scope/priorities, daily progress, blockers, timely sign-off). Testing on

real devices and emulators/simulators ; coverage across OS versions, screen sizes, locales, accessibility setups. Tooling:

Xcode

(logs, profiling),

Android Studio/ADB ,

Charles Proxy

or

Fiddler ,

Jira , . Manual REST API testing (Postman/Insomnia) and solid grasp of client–server interactions (headers, auth, caching). Excellent written/spoken English, crisp test docs and defect reports. Accessibility testing

to

WCAG 2.1 AA

(VoiceOver/TalkBack, color/contrast, semantics). Experience with

IAP/subscriptions , push notifications, deep links, geo features. Familiarity with

crash/analytics

stacks (Firebase, Datadog, Amplitude, Mixpanel, Sentry, Crashlytics). Exposure to mobile automation (XCUITest/Espresso/Maestro) and creating high-value automation backlog. Client-side performance profiling (startup time, memory, jank) and battery/network sensitivity checks.

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